A-2
RS-422 Termination Jumpers
Refer to the circuit board diagram on page A-1 for details.
The Base can be jumpered to be 422 terminated or not terminated. By
default, all Base stations are shipped as
terminated
. Use the following
guidelines to change the termination for your system:
•
If the Base has multiple strings of relays radiating from it, the
Base would
not
be terminated.
•
If the Base is first in a string, (not in the middle or end of a
string), set the 422 jumpers to
Base w/RS-422 termination
.
•
The last Relay in each string should have its jumpers set as a
Relay w/RS-422 termination.
Channel Changes
To determine the current channel of a Base Station , power up the Base
and watch the LED light on the front of the unit. On power UP, a Base
LED will blink "c3" times. For example, a unit that blinks
5
times on power up is operating on
channel 2
. Channel 0 blinks 3 times,
channel 5 blinks 8 times.
A Base Station jumpered to operate as a Base blinks green; a Base
Station jumpered to operate as a Relay blinks yellow.
Changing the Channel on a Base/Relay
The Base Station and its related Relays must have their frequencies set
to the same channel as the R/F Terminals in their network. The channel
is set on a Base /Relay by turning a rotary switch to the setting 0-F (10
different channels to choose from). Use a very small flat head
screwdriver to turn the switch to the desired number. See the circuit
board diagram on page A-1 for location of the rotary switch
Setting the Relay ID
Each Relay must also have a unique ID, which is set by the RF
Terminal Serial Configuration Utility.
